For me it was 2 years ago. I was reading something on Wikipedia about JWs and the GB. At the end it said about critisisms and referenced Ray Franz and his book 'Crisis of Conscience'. My curiosity was piqued... what harm would it do to peek behind closed doors? I'd always wondered what was so mysterious about the GB. I read the book, then I read his next one 'In Search of Christian Freedom'. The veil was lifted, my eyes were opened and I saw the man behind the curtain! There was no going back.
My next foray was on Jwstruggle, a brilliant website for newly awakened JWs. Then of course Jwfacts and here. The rest is history.